@misc{indiciae2dbc4db8742d,
  title = {Isoreflectance map of the J sandstone in the Denver Basin of Colorado},
  author = {D.K. Higley and M. J. Pawlewicz and D. L. Gautier},
  year = {1985},
  doi = {10.3133/ofr85384},
  url = {https://pubs.usgs.gov/publication/ofr85384},
  note = {Source identifier: ofr85384}
}